Improvement in bung-borers



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Letters Patent No. 82,374, dated September 22, 1868.

IMPROVEMENT IN BLING-BORBRS.

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TO ALL WHOM IT MAY CONCERN:

Be it known that we, JOHN G. BAKER and HE NRY ASBURY, both ofPhiladelphia, Pennsylvania, have invented an Improved Bung-Hole Borer; and we do hereby declare the following to be a full, clear, and exact description of the same.

Our invention consists of an improvement, fully described hereafter, in the bung-hole borer described and illustrated in the English patent granted to John Grist, July 25, 1853, our improvement being such-that the processes of boring and reaming may be conducted simultaneously with facility. Y

In order to enable others skilled in the art to make and use our invention, we will now proceed. to describe its construction and operation, reference being had tp the accompanying drawing, which forms a part of this specification, and in whieh- Figure 1 is an exterior view of our improved bung-hole borer,

Figure 2 a vertical section, arid Figure 3 a sectional plan on the line 1 2, iig. 2.

The stock A of the instrument consists of a tapering tube closed at the lower end, with the exception of `an opening referred to hereafter, and having at the upper end projections a a, through enlargements, in which passes the transverse handle D.

From the lower end of the stock projects a tapering-pointed screw, b, and into a vertical slot, c,- in the side, and. extending through the bottom of the stock, is introduced a steel blade, C, which is screwed in the inclined position shown in fig. 3, to the interior of the stock, the blade being reduced to a sharp-cutting edge, z', throughout its entire length, as well as at its lower rounded end, so as to form a gouging or boring-edge, 2:, which'projects beyond the bottom of the stock.

On applying the end ofthe instrument to a barrel, of whicha portion is represented at E, and turning'the tool by means of the handle D, the pointed screw b, which rst penetrates the wood, will draw the instrumentA downwards, while the lower gouging or boring-edge, rc, of the blade, cuts away the wood, the reaming-edge, x', of the blade at the same time shaving away the sides of the opening madev by the end x.

After thelower end of the instrument has passed through the stave of the barrel, the opening may be enlarged or reamed to an extent necessary for receiving the bung by forcing downwardan'd turning the instrument, the size of the opening depending upon the extent to which the instrument projects through the stave, and the sides of the opening having the desired taper.

The chips resulting both from the boring and reaming operations pass through the slot a into the stock,-v and are there out'of the way, while the boring and reaming are continued, and do notinterfere with the proper operation ofthe instrument. On withdrawing and inverting the latter, however, the hollow stock may at once be emptied of its contents.

In the bung-hole borer illustratedi and described in the English patent, No. 476, granted to John Grist, February 25, 1853, for machinery o'r apparatus for manufacturing'casks, vats, and-other like vessels, there is v.a central tapering point, serving as a guide only, and the boring is effected by the application of pressure to the instrument while the latter is turned, a. planvwhich may answer the desired purpose where motive-power is employed, ,as in the saidEnglish patent, but which, in an instrument to be used by hand, would demand undue exertion, which is obviated by the employment of the tapering screw, in 'combination with the-blade, which acts simultaneously as both borer and reamer.

On the 22d of July, 1856, a patent was granted toJosiah Kirby for a bung-hole borer, and another patent -to Lyman Gray, on the 12th of December, 1865, but both instruments consist of boring-bits engrafted on reamers, the borer doing its duty first, and the reamer acting afterwards, whereas in our instrument the reaming and boring are performed simultaneously.

We therefore claim as our invention, and desire tosecure by Letters Patent, as an improvement on the instrument described in the aforesaid English patent- The combination of the tapering tubular stock A, its boring-edge nz, reaming-edge at', and tapering screw 6, the whole being constructed and arranged substantially as and for the purpose herein set forth.

In testimony whereof, we have signed our names to this specification in the presence of two subscribing witnesses.

, JOHN G. BAKER,

HENRY ASBUBY Witnesses:

H. HowsoN, JOHN WHITE. 

